Tamara and Nicki, both calendar-year taxpayers, each own a 25% interest in Partnership TNT. Techron, Inc., whose fiscal year ends on July 31, 2017, owns a 50% interest in Partnership TNT. Partnership TNT has not established a business purpose for using a different tax year, nor has it made a fiscal year tax-year election. On what date does Partnership TNTs required tax year end?

March 15, 2017.

April 18, 2017.

July 31, 2017.

December 31, 2017.